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Reload Thread: port area for 12" TC9

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    port area for 12" TC9

    im trying to figure out a good port area to aim for for a 12" TC9 when tuning to 28-30hz. max enclosure dimensions are 16T 28W 14D, which nets me about 2.9 cubes gross. not sure what actual driver displacement is so ive been using .12 just to be on the safe side. so far ive come up with 14T 28W 14D with a 12.5X1.5" port 28" long. this gives me 1.98 cubes net with a tuning of ~28hz, a 1:8.33 port ratio and 18.75" of port area. im thinking i need more port area, but the only way i can do that is to go to 16" tall and make a 14.5X1.5" port 28" long which puts my port ratio over 1:9.

    any help would be appreciated. getting the wood cut tomorrow.

    Matt



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420




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    Re: port area for 12" TC9

    You can't just go from 12.5x1.5 up to 14.5x1.5 and keep the same length, that changes tuning and pushes it higher. To keep the same tuning, you will also need to lengthen the port if you increase area.

    Thought you were going sealed with this? 1.98 net will be too big of you plan on putting real power on it. 1.2 to 1.5 will be best to keep excursion under control.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

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    Re: port area for 12" TC9

    i spent some time doing some modeling on a friends computer and im not sure i want to stick with sealed. the 14.5" X 1.5" port goes along with making the height 2" taller. its odd but torres says that the tuning will be ~28hz.

    Matt



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

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    Re: port area for 12" TC9

    dbl post



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

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    ciaonzo's Avatar
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    Re: port area for 12" TC9

    Gonna be loud. Just be careful, that's not a stiff suspension. Don't put it in an enclosure that's too big because that bish strokes. Need to keep good control on it.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

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    Re: port area for 12" TC9

    im having trouble keeping port area up and port length down. lol, i may end up just doing a **** 6" aero...

    Matt

    edit, would a single 4" aero be enough port? if so i could seriously cut the size down on the box. im so **** undecided on this its not funny. i just dont want to waste the wood on a box that i dont think sounds decent. especially since ill most likley be stuck with it for awhile.



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

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    ciaonzo's Avatar
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    Re: port area for 12" TC9

    Nope. Go with the 6" or use a PR. Based on what you told me you were after, I would try sealed first.



    Quote Originally Posted by audioholic View Post
    Saying "clipping doesn't kill speakers" is a half-truth at best. Technically no, clipping itself does not hurt the speaker. But in clipping your amp, you can easily create a situation that WILL kill the speaker. Was the squared waveform the DIRECT cause of the failure? No. In the end, the answer is, always has been, and can only be... heat kills speakers. BUT, clipping increases heat generation, sometimes by a drastic amount. So to start a thread simply to state that clipping does not hurt speakers is, again, a half-truth at best.

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    Re: port area for 12" TC9

    lol, im PMing you now.



    Star Mountain Nuthugger #5
    12" TC9 in 1.39 cubes @30hz
    Boston Acoustics GT-2300 @4 ohms bridged.

    Quote Originally Posted by double 07 View Post
    Sub cutout got a little skar on it...dad blamed round over bit bearing came flying off.......LOL.......
    Quote Originally Posted by gckless View Post
    A little Skar on it? Was it a B-stock bit?
    Refs:
    bought from Nitefury360, Tallic, SPLaudio X2
    Traded with Marleyskater420

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